... 2 Fully Configurable Inputs Seamless Switcher, audio visual solution product, LED display Video Processor(VSP 1121) 1 3 layers Processing2. 2 Fully ... preview VGA output ,and another 2 DVI output for back end DVI system like LED display. VSP 1121 is available to be controled ... the RGBlink software. Seamless Switcher, with Preview monitor, USB input, LED display Video Processor(VSP 1121)Demo diagram